code: def dequeue(self):
      res_list = self.db.keys(RESULT_PREFIX + self.name + ":*")
      decoded = {}
      for res in res_list:
          res_dict = self.db.hgetall(res.decode("utf-8"))
          res_id = res.decode("utf-8").split(":")[1]
          res_value = res_dict[b"value"].decode("utf-8")
          if res_value == "NaN":
              decoded[res_id] = "NaN"
          else:
              decoded[res_id] = self.get_ndarray_from_b64(res_value)
          self.db.delete(res)
      return decoded
  
imports: import redis
  import time
  from bigdl.serving.schema import *
  import httpx
  import json
  import uuid
  from bigdl.serving.log4Error import invalidInputError
label_desc: Use image node_id 2 for calling the OutputQueue obj's underlying member method code with example usage: obj.dequeue() and returns: decoded